I just took the car to BMW because my wipers don't return to the lowest original position. They go all the way down then come back up about an inch. So the service guy calls me and says it'll cost $120 to adjust the wiper. When I asked him what exactly they'd be doing he said something about adjusting the wiper by moving it over a couple of teeth. So I told him I'd do it myself. Can anyone help me out and give me directions so I can save the $120 bucks?